700 IR Series. Instruction Manual. Infrared Gas Detector for Combustible and CO 2 gases OLCT 700 OLCT 710. The Fixed Gas Detection Experts

Transcription

1 Instruction Manual 700 IR Series Infrared Gas Detector for Combustible and CO 2 gases OLCT 700 OLCT 710 Part Number: NP700IRIMEN Revision: B.1 The Fixed Gas Detection Experts

2 Copyright Jan 2016 by Oldham S.A.S. All rights reserved. No reproduction of all or part of this document, in any form, is permitted without the written consent of Oldham S.A.S. All of the information that is provided in this document is accurate to the best of our knowledge. As a result of continuous research and development, the specifications of this product may be changed without prior notice. Oldham S.A.S. Rue Orfila Z.I. Est CS F ARRAS Cedex Tel: +33 (0) Fax: +33 (0) ii OLCT 700/710 IR

3 Table of Contents 1. Introduction Description Modular Mechanical Design Plug-in Replaceable Sensor Installation ATEX Operational Guidelines for Safe Use Functional Safety (SIL 2) Detector Placement Sensor Contaminants and Interference Mounting Installation Electrical Installation Field Wiring Initial Start Up Operation Programming Magnet Operating Instructions Operator Interface Normal Operation Calibration Mode (AutoZero and AutoSpan) Program Mode Program Features RS-485 Modbus Protocol Service and Maintenance Calibration Frequency Visual Inspection Condensation Prevention Packet Replacement of IR Plug-in Combustible Gas Sensor Troubleshooting Guide Appendix Specifications Spare Parts, Detector Accessories, Calibration Equipment OLCT 700/710 IR Drawings EC Declaration of conformity Revision Log OLCT 700/710 IR iii

4 Table of Figures Figure 1: Sensor Cell Construction... 2 Figure 2: Principle of Operation... 2 Figure 3: Detector Assembly Breakaway... 3 Figure 4: OLCT 700 Assembly Front View... 3 Figure 5: OLCT 710 Front View... 4 Figure 6: OLCT 700/710 IR Plug-in Sensor Cell... 4 Figure 7: ATEX Approval Label... 5 Figure 8: Outline and Mounting Dimensions... 8 Figure 9: Typical Installation... 9 Figure 10: Sensor Wire Connections Figure 11: Magnetic Programming Tool Figure 12: Magnetic Programming Switches Figure 13: OLCT 700/710 IR Software Flowchart Figure 14: Sensor Assembly List of Tables Table 1: Wire Gauge vs. Distance Table 2: Gas Factors Table 3: Modbus Registers Table 4: Modbus Special Registers iv OLCT 700/710 IR

5 Thank you for choosing this OLDHAM instrument. All of the necessary actions have been taken in order to ensure your complete satisfaction with this equipment. It is important that you read this entire manual carefully and thoroughly. Limitation of Reliability OLDHAM shall not be held responsible for any damage to the equipment or for any physical injury or death resulting in whole or in part from the inappropriate use, installation, or storage of the equipment, which is the result of not complying with the instructions and warnings, and/or with the standards and regulations in force. OLDHAM does not support or authorise any business, person, or legal entity in assuming responsibility on behalf of OLDHAM, even though they may be involved in the sale of OLDHAM products. OLDHAM shall not be responsible for any damage, direct or indirect, or for damages and interest, direct or indirect, resulting from the sale and use of any of its products UNLESS SUCH PRODUCTS HAVE BEEN DEFINED AND CHOSEN BY OLDHAM FOR THE USE THAT THEY ARE INTENDED. Ownership clauses The drawings, specifications, and information herein contain confidential information that is the property of OLDHAM. This information shall not, either in whole or in part, by physical, electronic, or any other means whatsoever, be reproduced, copied, divulged, translated, or used as the basis for the manufacture or sale of OLDHAM equipment, or for any other reason without the prior consent of OLDHAM. Warning This is not a contractual document. In the best interest of its customers and with the aim of improving performance, OLDHAM reserves the right to alter the technical features of its equipment without prior notice. READ THESE INSTRUCTIONS CAREFULLY BEFORE THE FIRST USAGE: these instructions should be read by all persons who have or will have responsibility for the use, maintenance, or repair of the instrument. This instrument shall only be deemed to be in conformance with the published performance if used, maintained, and repaired in accordance with the instructions of OLDHAM by OLDHAM personnel or by personnel authorised by OLDHAM. Guarantee Under normal conditions of use and on return to the factory, sensors and electronics parts are guaranteed for 2 years from date of shipment; excluding consumables as dessiccant, filters, etc. Destruction of the equipment European Union (and EEA) only. This symbol indicates that, in conformity with directive DEEE (2002/96/CE) and according to local regulations, this product may not be discarded together with household wasteit must be disposed of in a collection area that is set aside for this purpose, for example at a site that is officially designated for the recycling of electrical and electronic equipment (EEE) or a point of exchange for authorized products in the event of the acquisition of a new product of the same type as before. OLCT 700/710 IR v

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7 1. Introduction 1.1 Description Oldham OLCT 700 IR combustible gas transmitters are non-intrusive Smart detectors designed to detect and monitor combustible hydrocarbon or CO 2 gases in air. The range of detection is 0-100% LEL or from 5 to 100% volume of CO 2. The detector features an LED display of current reading, fault and calibration status. The unit is equipped with standard analog 4-20mA and Modbus RS- 485 outputs. A primary feature of the detector is its method of automatic calibration, which guides the user through each step via fully scripted instructions shown on the LED display. OLCT 710 OLCT 700 The microprocessor-supervised electronics are packaged in an encapsulated module and housed in an explosion proof casting. The unit includes a 4 character alpha/numeric LED used to display detector readings and the detector s menudriven interface when the hand-held programming magnet is used. The OLCT 710 is made of an OLCT 700 attached to a flameproof junction that includes terminal blocks and an optional surge protection board. The complete assembly is flameproof certified «Ex d» and carries ATEX approval (see section ATEX Operational Guidelines for Safe Use). The OLCT 700 is flameproof certified and carries ATEX approval. The OLCT 700 shall be attached to an increased safety certified junction box when used in an ATEX zone (see section see section ATEX Operational Guidelines for Safe Use) Non-Dispersive Infrared (NDIR) Optical Sensor Technology The sensor technology is designed as a miniature plug-in replaceable component, which can easily be changed out in the field. The NDIR sensor consists of an infrared lamp source, two pyro electric detectors, and an optical gas sample chamber. The lamp source produces infrared radiation, which interacts with the target gas as it is reflected through the optical gas sample chamber. The infrared radiation contacts each of the two pyro electric detectors at the completion of the optical path. The active pyro electric detector is covered by a filter specific to the part of the IR spectrum where the target gas absorbs light. The reference pyro electric detector is covered by a filter specific to the non-absorbing part of the IR spectrum. When the target gas is present, it absorbs IR radiation and the signal output from the active detective decreases accordingly. The reference detector output remains unchanged. The ratio of the active and reference detector outputs are then used to compute the target gas concentration. The technique is referred to as non-selective and may be used to monitor most any combustible hydrocarbon gas. The technique for CO 2 is similar except that the sensor provides a selective response to CO 2. Unlike catalytic bead type sensors, Oldham IR sensors are completely resistant to poisoning from corrosive gases and they can operate in the absence of an oxygen background. The sensors are characteristically stable and capable of providing reliable performance for periods exceeding 5 years in most industrial environments. OLCT 700/710 IR Instruction Manual Rev. B1 Page 1 of 46

8 Figure 1: Sensor Cell Construction Principle of Operation The target gas diffuses through a sintered stainless steel flame arrestor and into the volume of the sample gas optical chamber. An alternating miniature lamp provides a cyclical IR radiation source, which reflects through the optical gas sample chamber and terminates at two pyro electric detectors. The active and reference pyro electric detectors each give an output which measures the intensity of the radiation contacting their surface. The active detector is covered by an optical filter specific to the part of the IR spectrum where the target gas absorbs light. The reference detector is covered by a filter specific to the non-absorbing part of the IR spectrum. When present, the target gas absorbs a fraction of the IR radiation and the signal output from the active detector decreases accordingly. The signal output of the reference detector remains unchanged in the presence of the target gas. The ratio of the active/reference signal outputs is then used to compute the target gas concentration. By using the ratio of the active/reference signal outputs, measurement drift caused by the changes in the intensity of the IR lamp source or changes in the optical path s reflectivity is prevented. Figure 2: Principle of Operation Performance Characteristics The IR sensor maintains strong sensitivity to most all combustible hydrocarbon gases in the Lower Explosive Limit (LEL) range. When compared with the typical catalytic bead LEL sensor, the IR sensor exhibits improved long-term zero and span stability. Typical zero calibration intervals would be quarterly to semi-annual and typical span intervals would be semi-annual to annual. However, actual field experience is always the best determination of appropriate calibration intervals. NOTE: The OLCT 700/710 IR detector will not respond to combustible gases that are not hydrocarbons, such as H 2, NH 3, CO, H 2 S, etc.. It can only be used to measure hydrocarbon type gases. The IR sensor generates different signal sensitivity levels for different combustible hydrocarbon target gases. Unless otherwise specified the OLCT 700/710 IR detector will be factory calibrated for methane service. If the target hydrocarbon gas is other than methane, then the unit will have to be span calibrated and configured accordingly per this Instruction Manual. Page 2 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

9 detcon OLDHAM inc. OLCT MODEL IR IR LEL Sensor OLCT 700/710 IR 1.2 Modular Mechanical Design The OLCT 700 IR Detector Assembly is completely modular and made up of four parts (See Figure below): Housing Bottom Assembly Plug-in Replacable Combustible Hydrocarbon Sensor Lens and LCD Display Splash Guard LEL-LIE-UEG O-Rings Housing Bottom Locking Set-Screw Magnetic Programming Switches Intelligent Transmitter Module (ITM) Micro-Processor controlled circuit encapsulated in an explosion proof housing. Figure 3: Detector Assembly Breakaway 1) OLCT 700 IR Intelligent Transmitter Module (ITM). The ITM is a fully encapsulated microprocessor-based package that accepts a plug-in field replaceable sensor. Circuit functions include LED display, magnetic programming switches, a linear 4-20mA DC output, and a Modbus RS-485 output. Magnetic program switches allow non-intrusive operator interface. 2) Field Replaceable Plug-in Infra-Red Gas Sensor 3) Housing Bottom Assembly (contains the Housing Bottom, Flame Arrestor, Retaining Ring, and rubber O-Rings) 4) Splash Guard. NOTE: All metal components are constructed from electro-polished 316 Stainless Steel in order to maximize corrosion resistance in harsh environments. Program Switch #1 detcon OLDHAM inc. OLCT MODEL IR IR LED Display Program Switch #2 Splash Guard Adapter Locking Set-Screw LEL LEL-LIE-UEG Sensor Figure 4: OLCT 700 Assembly Front View OLCT 700/710 IR Instruction Manual Rev. B1 Page 3 of 46

10 OLCT 710 is made of an OLCT 700 attached to a flameproof certified junction box for terminal connections. Cover Locking Screw M34 - ¾ NPT Adapter Locking Screw Figure 5: OLCT 710 Front View 1.3 Plug-in Replaceable Sensor The Oldham IR combustible hydrocarbon gas sensor is a unique and miniaturized single-package optical design that generates enough internal heat to prevent condensation. It is packaged as a true plug-in replaceable type sensor with over-sized gold-plated connections that eliminate corrosion problems. It can be accessed and replaced in the field very easily by releasing the locking screw and unthreading the housing bottom. The Oldham IR combustible hydrocarbon gas sensor and the CO 2 gas sensor have an infinite shelf life, and are supported by a 2-year warranty. The expected service life is 5 years or greater. Figure 6: OLCT 700/710 IR Plug-in Sensor Cell Page 4 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

11 2. Installation 2.1 ATEX Operational Guidelines for Safe Use OLCT 700/710 conforms to the requirements of European Directive ATEX 94/9/CE relating to explosive Gas atmospheres. The information given in the following sections should be respected and taken into account by the manager of the site where the equipment is installed. As far as the aim of improving the health and safety of workers who are exposed to the risks of explosive atmospheres is concerned, refer to European Directive ATEX 1999/92/CE. 1. Install detector only in areas with classifications matching with those described on the ATEX approval label. Follow all warnings listed on the label. Figure 7: ATEX Approval Label 2. Cable glands shall be flameproof certified («Ex d») for use in explosive atmospheres. Ingress Protection will be greater or equal to IP66. Cable glands will be mounted according to IEC/EN standard, edition in force, and to additional requirements from local standards. They shall be of M20x1.5 or ¾ NPT type. In the case of an ISO thread (M20), the engagement shall be 5 threads at least. Cables used shall have an operating temperature range equal or greater than 80 C. 3. The threaded joints may be lubricated to maintain flameproof protection. Only non-hardening lubricants or non-corrosive agents having no volatile solvents may be used. 4. Verify a good ground connection between the junction box and earth ground. 5. Ensure the Housing Bottom is threaded tightly to the Intelligent Transmitter Module. The locking setscrew (M3.5 x 0.6 6g6h Stainless Steel Allen set screw cup point with yield strength of greater than 40,000 PSI, typical 80,000 PSI) should then be tightened down to keep the Housing Bottom from being inadvertently removed or from becoming loose under vibration. The locking setscrew ensures that Housing Bottom is only removable by authorized personnel with the use of special tools. A M1.5 Allen Wrench is required. If screw requires replacement, only an identical screw may be used. 6. Removal of the Housing Bottom violates the Ex d protection method and hence power must be removed from the detector prior its safe removal. 7. Proper precautions should be taken during installation and maintenance to avoid the build-up of static charge on the plastic components of the detector. These include the splashguard and splashguard adapter. 8. When used in ATEX zone, OLCT 700 shall be attached to increased safety certified junction box only. OLCT 700/710 IR Instruction Manual Rev. B1 Page 5 of 46

12 2.2 Functional Safety (SIL 2) Refer to safety user manual NP700IRSMEN 2.3 Detector Placement Selection of detector location is critical to the overall safe performance of the product. Five factors play an important role in selection of detector locations: (1) Density of the gas to be detected (2) Most probable leak sources within the industrial process (3) Ventilation or prevailing wind conditions (4) Personnel exposure. (5) Maintenance access. Density Placement of detectors relative to the density of the target gas is such that detectors for the detection of heavier than air gases should be located within 4 feet of grade as these heavy gases will tend to settle in low lying areas. For gases lighter than air, detector placement should be 4-8 feet above grade in open areas or in pitched areas of enclosed spaces. NOTE: Methane is lighter than air. Most other combustible hydrocarbon gases are heavier than air. Compare the molecular weight, density, or specific gravity of the target gas(es) with that of air to determine appropriate placement. Leak Sources The most probable leak sources within an industrial process include flanges, valves, and tubing connections of the sealed type where seals may either fail or wear. Other leak sources are best determined by facility engineers with experience in similar processes. Ventilation Normal ventilation or prevailing wind conditions can dictate efficient location of gas detectors in a manner where the migration of gas clouds is quickly detected. Personnel Exposure The undetected migration of gas clouds should not be allowed to approach concentrated personnel areas such as control rooms, maintenance or warehouse buildings. A more general and applicable thought toward selecting detector location is combining leak source and perimeter protection in the best possible configuration. Maintenance Access Consideration should be given to providing easy access for maintenance personnel. Consideration should also be given to the consequences of close proximity to contaminants that may foul the sensor prematurely. NOTE: In all installations the gas detector should point straight down (refer to Figure 8: Outline and Mounting Dimensions. Improper detector orientation may result in false readings and permanent detector damage. Additional Placement Considerations The detector should not be positioned where it may be sprayed or coated with surface contaminating substances. Painting detector assemblies is prohibited. Page 6 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

13 Although the detector is designed to be RFI resistant, it should not be mounted in close proximity to highpowered radio transmitters or similar RFI generating equipment. When possible, mount the detector in an area void of high wind, accumulating dust, rain, or splashing from hose spray, direct steam releases, and continuous vibration. If the detector cannot be mounted away from these conditions then make sure the Oldham Harsh Environment Splashguard accessory is used (PN DET ). Do not mount in locations where temperatures will exceed the operating temperature limits of the detector. Where direct sunlight leads to exceeding the high temperature-operating limit, use a sunshade to help reduce temperature. 2.4 Sensor Contaminants and Interference Oldham OLCT 700/710 IR combustible hydrocarbon gas detectors may be adversely affected by exposure to certain airborne substances. Loss of sensitivity or corrosion may be gradual if such materials are present in sufficient concentrations. The performance of the IR sensor may be impaired during operation in the presence of substances that can cause corrosion on gold plating. Other inhibiting substances are those that can coat the internal walls of the optical chamber and reduce reflectivity. These include but are not limited to heavy oil deposits, dust/powder, water condensation, and salt formation. Continuous and high concentrations of corrosive gases (such as Cl 2, H 2 S, HCl, etc.) may also have a detrimental long-term effect on the sensor s service life. The presence of such substances in an area does not preclude the use of this sensor technology, although it is likely that the sensor lifetime will be shorter as a result. Use of this sensor in these environments may require more frequent calibration checks to ensure safe system performance. For the OLCT 700/710 IR Combustible gas detectors there are no known cross-interference gases that are not combustible hydrocarbon gases. For the OLCT 700/710 IR CO 2 detector, there are no known cross interference gases. 2.5 Mounting Installation The installation should meet all the regulations currently in force for installations in explosive atmospheres, in particular the standards IEC/EN and IEC/EN (whichever editions are in force) or in accordance with other national standards. The equipment is allowed in ATEX zones 1 and 2 for ambient temperatures ranging from -40 C to +75 C. Understand that operating temperature range may be different (see technical specifications). The sensor shall always be in contact with ambient air. Therefore, - do not cover the detector - do not paint detector assemblies - avoid dust accumulation OLCT 700/710 IR Instruction Manual Rev. B1 Page 7 of 46

14 The OLCT 700/710 IR should be vertically oriented so that the detector points straight downward (see Figure below). Installation of the enclosure shall be secured with 4 x M6 screws and the appropriate plugs for the supporting material. There is an adaptor plate for ceiling installation (PN ). Ground Ground Figure 8: Outline and Mounting Dimensions When mounting on a pole, secure the Junction Box to a suitable mounting plate and attach the mounting plate to the pole using U-Bolts (Pole-Mounting brackets for Oldham J-box accessories are available separately). 2.6 Electrical Installation The installation should meet all the regulations currently in force for installations in explosive atmospheres, in particular the standards IEC/EN and IEC/EN (whichever editions are in force) or in accordance with other national standards. OLCT 700 and OLCT 710 are certified for use in ATEX zones 1 and 2, group IIB+H2, T4. Proper electrical installation of the gas detector is critical for conformance to Electrical Codes and to avoid damage due to water leakage. Refer to Figure 9 and Figure 10 for proper electrical installation. Page 8 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

15 Unused port shall be sealed with the «Ex d» certified plug delivered along with the transmitter. Figure 9: Typical Installation NOTE: The Oldham Warranty does not cover water damage resulting from water leaking into the enclosure. However, since the electronics are 100% epoxy encapsulated, only the wire terminations could get wet. Moisture could cause abnormal operation and possibly corrosion to the terminal connections, but permanent damage to the detector would not be expected. NOTE: Any unused ports should be blocked with suitable ¾ male NPT plugs. Oldham Supplies one ¾ NPT male plug with their accessory J-box enclosures. If connections are other than ¾ NPT, use an appropriate male plug of like construction material. 2.7 Field Wiring Oldham OLCT 700/710 IR combustible hydrocarbon gas detector assemblies require three conductor connections between power supplies and host electronic controller s 4-20mA output, and 2 conductor connections for the Modbus RS-485 serial interface. Wiring designations are + (24VDC), (0V), ma (detector signal), and Modbus RS-485 A (+), and B (-). Maximum wire length between detector and 24VDC source is shown in the Table below. Maximum wire size for termination in the Oldham J-Box accessory is 14AWG. Max loop load resistance between green and black wire (analog signal output) is 500 ohms. Minimum loop load resistance between green and black wire is 100 ohms. This is considers wire diameter, wire length, max operating temperature and selected termination resistor. OLCT 700/710 IR Instruction Manual Rev. B1 Page 9 of 46

16 Table 1: Wire Gauge vs. Distance AWG Wire Dia. Cross Section Meters/Feet Over-Current Protection 22 0,65 mm 0,32 mm² 700/2080 3A 20 0,8 mm 0,5 mm² 1120/3350 5A 18 1,0 mm 0,8 mm² 1750/5250 7A 16 1,3 mm 1,3 mm² 2800/ A 14 1,6 mm 2 mm² 4480/ A NOTE 1: Wiring table is based on stranded tinned copper wire and is designed to serve as a reference only. NOTE 2: Shielded cable is required for installations where cable trays or conduit runs include high voltage lines or other possible sources of induced interference. Separate conduit or tray runs are highly recommended in these cases. NOTE 3: The supply of power should be from an isolated source with over-current protection as stipulated in table Cable Preparation NOTE : It is essential that the instructions provided by the manufacturer of the cable gland are followed and the braid is correctly connected. 1 - Remove the rubber pot and the two metal washers (A) 2 - Arrange the cable as shown in the picture 3 Arrange the braid as shown in the picture. Avoid creating "pigtails" Page 10 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

17 (+) (-) ma A(+) B(-) Red Grn Blk Wht Blu OLCT 700/710 IR 4 - Insert the part back into the OLCT Terminal Connections CAUTION: Do not apply System power to the detector until all wiring is properly terminated and openings are properly closed. a) Remove the junction box cover. Identify the terminal blocks for customer wire connections (see Figure 10). NOTE : To remove the cover, tighten the locking screw before unscrewing the cover Locking screw Customer Supplied Wiring (In) Power from and 4-20mA out to Control Device (+) (-) ma Explosion Proof Junction Box Customer Supplied Wiring (Out to next Device) (+) (-) ma A(+) B(-) Modbus RS-485 to Host Control Device J1 Terminal A(+) B(-) Modbus RS-485 to next Device Install a Ohm resistor if the 4-20mA output is not used Wiring to Sensor Assembly Figure 10: Detector Wire Connections OLCT 700/710 IR Instruction Manual Rev. B1 Page 11 of 46

18 b) Observing correct polarity, terminate the 3-conductor 4-20mA field wiring (+, -, ma) to the detector assembly wiring in accordance with the detail shown in Figure 10. NOTE: If the 4-20mA output is not being used, the Green wire from the ITM must be connected to the Black wire at the (-) terminal on the Transient Protection Module to ensure RS-485 communication is not disrupted by a 4-20mA Fault. c) If applicable, terminate the RS-485 serial wiring. Use the second plug (Out) as termination point on the customer side to facilitate a continuous RS-485 serial loop. The RS-485 (if applicable) requires 24 gauge, two conductor, shielded, twisted pair cable between detector and host controller. General Cable Commodore part number ZO16P is recommended. NOTE: Install a 120 ohm resistor across A & B terminals on the last detector in the serial loop. d) Screw the cover firmly and loosen the locking screw until it reaches the cover. 2.8 Initial Start Up Upon completion of all mechanical mounting and termination of all field wiring, apply system power in the range of VDC (24 VDC typical) and observe the following normal conditions: a) OLCT 700/710 IR display reads 0, and no fault messages are flashing. b) A temporary non-zero reading may occur as the detector reaches stabilization. The reading will converge to 0 within 1-2 minutes of power-up, assuming there is no combustible gas in the area of the detector. NOTE: The 4-20mA signal is held constant at 4mA for the first two minutes after power up Initial Operational Tests After a warm up period of 1 hour, the detector should be checked to verify sensitivity to combustible gas. For the OLCT 700/710 IR CO 2 series detectors, test the detector with a suitable CO 2 span gas. Material Requirements PN DET OLCT 700/710 Series Splash Guard with integral Cal Port OR PN DET Threaded Calibration Adapter PN Span Gas; 2.5% vol. methane OR PN Span Gas; 2.5% vol. CO 2 a) Attach the calibration adapter to the threaded detector housing. Apply the test gas at a controlled flow rate of 0.5l/min. Allow 1-2 minutes for the reading to stabilize. Observe that during the 1-2 minutes the OLCT 700/710 display increases to a level near that of the applied calibration gas value. b) Remove test gas and observe that the display decreases to 0. Initial operational tests are complete. Oldham OLCT 700/710 IR combustible gas detectorss are factory calibrated prior to shipment, and should not require significant adjustment on start up. However, it is recommended that a complete calibration test and adjustment be performed 16 to 24 hours after power-up. Refer to zero and span calibration instructions in Section 3.4. Page 12 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

19 3. Operation 3.1 Programming Magnet Operating Instructions The Operator Interface of the OLCT 700/710 IR Series gas detectors is accomplished via two internal magnetic switches located to either side of the LED display (see Figure 12). The two switches, labeled PGM1 and PGM2, allow for complete calibration and configuration and thereby eliminate the need for area de-classification or the use of hot permits. Figure 11: Magnetic Programming Tool The magnetic programming tool (Figure 11) is used to operate the magnetic switches. Switch action is defined as momentary contact, 3-second hold, and 10-second hold (hold times are defined as the time from the point when the arrow-prompt appears). For momentary contact use, the programming magnet is briefly held over a switch location. The 3 and 10 second holds are generally used to enter calibration/program menus and save new data. The momentary contact is generally used to move between menu items and to modify set-point values. Arrows ( and ) are used on the LED display to indicate when the magnetic switches are activated. Program Switch #1 detcon OLDHAM inc. OLCT MODEL IR IR LED Display Program Switch #2 Splash Guard Adapter Locking Set-Screw LEL Sensor Figure 12: Magnetic Programming Switches NOTE: While in the Program Mode, if there is no magnetic switch interaction after 4 consecutive menu scrolls, the detector will automatically revert to normal operating condition. While changing values inside menu items, if there is no magnet activity after 3-4 seconds the detector will revert to the menu scroll (exception to this is with Signal Output Check mode). OLCT 700/710 IR Instruction Manual Rev. B1 Page 13 of 46

20 3.2 Operator Interface The operating interface is menu-driven via the two magnetic (PGM1 and PGM2) program switches located under the target marks of the detector housing. The menu list consists of three major items that include sub-menus as indicated below (refer to the complete Software Flow Chart in Figure 13: OLCT 700/710 IR Software Flowchart. Normal Operation Current Reading and Fault Status Calibration Mode AutoZero AutoSpan Program Mode View Sensor Status Sensor Model Type Current Software Version Gas Type Range of Detection Serial ID address AutoSpan Level Days From Last AutoSpan Remaining Sensor Life Gas Factor Raw Active Counts Raw Reference Counts 4-20mA Output Input Voltage Supply Sensor Temperature Set AutoSpan Level Set Gas Type & Range Set Gas Factor Set Serial ID Set Sensor Gain Signal Output Check Restore Default Settings Page 14 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

21 Normal Operation PGM1 (3) PGM2 (10) View Sensor Status Auto Time-Out PGM1/2 (M) PGM1/2 (3) Model Type PGM1 (3) PGM2 (3) Calibration Mode (Auto Zero) Calibration Mode (Auto Span) Set AutoSpan Level AutoTime-out PGM1/2 (M) PGM1/2 (3) Software Flowchart inc Set Gas Type & Range Auto Time-Out PGM1/2 (M) PGM1/2 (3) Type ## PGM2 (S) PGM1 (S) PGM1/2 (3) dec Set Gas Factor Auto Time-Out PGM1/2 (M) PGM1/2 (3) Version X.XX Gas Type inc ## PGM2 (S) PGM1 (S) PGM1/2 (3) dec inc Range ## PGM2 (S) PGM1 (S) PGM1/2 (3) dec inc ## PGM2 (S) PGM1 (S) PGM1/2 (3) dec Range XXX Serial ID XX XX Set Serial ID Auto Time-Out PGM1/2 (M) PGM1/2 (3) Set Sensor Gain Auto Time-Out PGM1/2 (M) PGM1/2 (3) Signal Output Check Auto Time-Out PGM1/2 (M) PGM1/2 (10) Last Cal XX Days Sensor Life XXX% inc ## PGM2 (S) PGM1 (S) PGM1/2 (3) dec Setting Gain Simulation PGM1/2 (3) Gas Factor = X.XX Act Counts = XXXX Ref Counts = XXXX ma Output = XX.XX Voltage XX.X VDC Temp = XX C Restore Defaults Auto Time-Out PGM1/2 (M) PGM2 (10) Defaults Restored LEGEND: PGM1 - Program Switch Location #1 PGM2 - Program Switch Location #2 (S) - Momentary Swipe (M) - Momentary hold of Magnet during text scroll until the ">" appears, then release (3) - 3 second hold from ">" prompt (10) - 10 second hold from ">" prompt Auto Time-out - 5 seconds inc - Increase dec - Decrease X, XX, XXX - numeric values Figure 13: OLCT 700/710 IR Software Flowchart 3.3 Normal Operation In normal operation, the OLCT 700/710 Display continuously shows the current detector reading, which will normally appear as 0. Once every 60 seconds the LED display will flash the detector s measurement units and gas type (i.e. % LEL). If the detector is actively experiencing any diagnostic faults, a Fault Detected message will flash on the display once every minute. When the unit is in Fault Detected mode, PGM1 or PGM2 can be swiped to prompt the detector to display the list of the active faults. In normal operation, the 4-20mA current output corresponds with the present gas concentration and fullscale range. The RS-485 Modbus serial output provides the current gas reading and fault status on a continuous basis when polled. Caution: Off-scale readings may indicate a flammable concentration of gas. OLCT 700/710 IR Instruction Manual Rev. B1 Page 15 of 46

22 3.4 Calibration Mode (AutoZero and AutoSpan) AutoZero The AutoZero function is used to set the detector s zero baseline. Local ambient air can be used to zero calibrate the detector as long as it can be confirmed that it contains no combustible hydrocarbon gases. If this cannot be confirmed then a zero air or pure N 2 cylinder should be used. With regards to CO 2 gas detectors, it is mandatory to use pure N 2 since ambient air contains naturally CO 2 at a level of 0.03 to 0.04% vol.. Material Requirements: PN DET MicroSafe Programming Magnet PN DET OLCT 700/710 Series Splash Guard with integral Cal Port and Calibration Wind Guard (PN DET ) -OR- PN DET Threaded Calibration Adapter PN Zero Air cal gas, or use ambient air if no combustible gas is present PN Pure N 2 cal gas for CO 2 gas detectors NOTE : The Calibration Wind Guard must be used when the Splashguard Adapter with integral Cal Port is used. Failure to use the Calibration Wind Guard may result in an inaccurate AutoZero calibration. a) If the ambient air is known to contain no combustible hydrocarbon gas content, it can be used to calibrate zero. If a zero air or N 2 gas cal cylinder is going to be used then attach the calibration adapter and set flow rate of 0.5l/min and let detector purge for 1-2 minutes before executing the AutoZero. b) From Normal Operation, enter Calibration Mode by holding the programming magnet over PGM1 for 3 seconds. Note, the prompt will show that the magnetic switch is activated during the 3 second hold period. The display will then scroll PGM1=Zero PGM2=Span. Hold the programming magnet over PGM1 for 3 seconds once the prompt appears to execute AutoZero (or allow to timeout in 5 seconds if AutoZero is not desired). NOTE 1: Upon entering Calibration Mode, the 4-20mA signal drops to 2mA and is held at this level until the program returns to normal operation. Modbus Status Register bit 14 is also set to signify when the detector is in-calibration mode. The OLCT 700/710 will display the following sequence of text messages as it proceeds through the AutoZero sequence: Zero Cal...Setting Zero... Zero Saved. c) Remove the zero gas and calibration adapter, if applicable AutoSpan The AutoSpan function is used to span calibrate the sensor. Span adjustment is recommended at 50% of range for LEL and CO 2 detectors. If a span gas containing the recommended concentration is not available, other concentrations may be used as long as they fall between 5% and 95% of the detector s range. However, any alternate span gas concentration value must be programmed via the Set AutoSpan Level menu before proceeding with AutoSpan calibration. The gas Factor Table (See Table 2) should be used for Methane and for Heavy Hydrocarbon gas. Page 16 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

23 Material Requirements: PN DET MicroSafe Programming Magnet PN DET OLCT 700/710 Series Splash Guard with integral Cal Port and Calibration Wind Guard (PN ) -OR- PN DET Threaded Calibration Adapter PN Span Gas; 2.5% vol. Methane (50% LEL) or other suitable span gas containing a certified level of % LEL concentration of common combustible hydrocarbon gas PN Span Gas; 2.5% vol. CO 2 for CO2 gas detectors NOTE 1: If the span gas is different from the measured target gas, remember to use the appropriate Gas Factor as described in Section NOTE 2: The Calibration Wind Guard must be used when the Splashguard Adapter with integral Cal Port is used. Failure to use the Calibration Wind Guard may result in an inaccurate AutoSpan calibration. NOTE 3: The procedure described below is for combustible gases detectors. With regards to CO 2 gas detectors, the procedure is identical to the display differences. a) Verify that the AutoSpan Level is equal to the calibration span gas concentration (refer to View Sensor Status in Section 3.5.2). If the AutoSpan Level is not equal to the calibration span gas concentration, adjust the AutoSpan Level as instructed in Section b) From Normal Operation, enter Calibration Mode by holding the programming magnet over PGM1 for 3 seconds. Note, the prompt will show that the magnetic switch is activated during the 3 second hold period. The display will then scroll PGM1=Zero... PGM2=Span. Hold the programming magnet over PGM2 for 3 seconds to execute AutoSpan (or allow to timeout in 5 seconds if AutoSpan is not intended). The OLCT 700/710 will then scroll Apply XX %LEL Gas (where XX is the AutoSpan Level). NOTE: Upon entering Calibration Mode, the 4-20mA signal drops to 2mA and is held at this level until the program returns to normal operation. Modbus Status Register bit 14 is also set to signify when the detector is in-calibration mode. c) Apply the span calibration test gas at a flow rate of 0.5l/min. As the detector signal begins to increase the display will switch to reporting a flashing XX reading as the detector shows the sensor s as found response to the span gas presented. If it fails to meet the minimum in-range signal change criteria within 2½ minutes, the display will report Range Fault twice and the OLCT 700/710 will return to normal operation, aborting the AutoSpan sequence. The detector will continue to report a Range Fault and will not clear the fault until a successful AutoSpan is completed. Assuming acceptable sensor signal change, after 1 minute the reading will auto-adjust to the programmed AutoSpan level. During the next 30 seconds, the AutoSpan sequence checks the sensor for acceptable reading stability. If the sensor fails the stability check, the reading is re-adjusted back to the AutoSpan level and the cycle repeats until the stability check is passed. Up to three additional 30-second stability check periods are allowed before the unit reports a Stability Fault twice and the OLCT 700/710 will return to normal operation, aborting the AutoSpan sequence. The detector will continue to report a Stability Fault and will not clear the fault until a successful AutoSpan is completed. If the sensor passes the stability check, the OLCT 700/710 reports a series of messages: AutoSpan Complete Sensor Life XXX% Remove Span Gas OLCT 700/710 IR Instruction Manual Rev. B1 Page 17 of 46

24 d) Remove the span gas and calibration adapter. The OLCT 700/710 will report a live reading that alternates with Remove Gas message as it clears toward 0. When the reading clears below 5 % LEL, the detector will display Span Complete and will revert to normal operation. If the sensor fails to clear to less than 5 % LEL in less than 5 minutes, a Clearing Fault will be reported twice and the detector will return to normal operation, aborting the AutoSpan sequence. The OLCT 700/710 will continue to report a Clearing Fault and will not clear the fault until a successful AutoSpan is completed. NOTE 1: If the sensor fails the minimum signal change criteria, a Range Fault will be declared and a Fault Detected message will be displayed alternately with the detector s current reading. The 4-20 output will be taken to 0mA and the Range Fault fault bit will be set on the Modbus output. NOTE 2: If the sensor fails the stability criteria, a Stability Fault will be declared and a Fault Detected message will be displayed alternately with the detector s current reading. The 4-20mA output will be taken to 0mA and the Stability Fault fault bit will be set on the Modbus output. NOTE 3: If the sensor fails the clearing time criteria, a Clearing Fault will be declared and a Fault Detected message will be displayed alternately with the detector s current reading. The 4-20 output will be taken to 0mA and the Clearing Fault fault bit will be set on the Modbus output. 3.5 Program Mode Program Mode provides a View Sensor Status menu to check operational and configuration parameters. Program Mode also provides for adjustment of the AutoSpan Level, Gas Factor, Gas Type and Range, and Serial ID. Additionally, it includes the Set Sensor Gain, Restore Factory Defaults, and Signal Output Check diagnostic functions. The Program Mode menu items appear in the order presented below: View Sensor Status Set AutoSpan Level Set Gas Type and Range Set Gas Factor Set Serial ID Set Sensor Gain Signal Output Check Restore Defaults Navigating Program Mode From Normal Operation, enter Program Mode by holding the magnet over PGM2 for 10 seconds. Note, the prompt will show that the magnetic switch is activated during the 10 second hold period. The OLCT 700/710 will enter Program Mode and the display will scroll the first menu item View Sensor Status. To advance to the next menu item, hold the magnet over PGM1 or PGM2 while the current menu item s text is scrolling. At the conclusion of the text scroll the prompt ( for PGM2 or for PGM1) will appear, and immediately remove the magnet. The OLCT 700/710 will advance to the next menu item. Repeat this process until the desired menu item is displayed. Note, PGM1 moves the menu items from right to left and PGM2 moves the menu items from left to right. To enter a menu item, hold the magnet over PGM1 or PGM2 while the menu item is scrolling. At the conclusion of the text scroll the prompt ( for PGM2 or for PGM1) will appear, continue to hold the magnet over PGM1 or PGM2 for an additional 3-4 seconds to enter the selected menu item. Page 18 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

25 If there is no magnet activity while the menu item text is scrolling (typically 4 repeated text scrolls), the OLCT 700/710 will automatically revert to Normal Operation View Sensor Status View Sensor Status displays all current configuration and operational parameters including: sensor type, software version number, detection range, AutoSpan level, days since last AutoSpan, estimated remaining sensor life, gas factor, gas type, input voltage, 4-20 output, active counts, reference counts, and detector ambient temperature. From the View Sensor Status text scroll, hold the magnet over PGM1 or PGM2 until the prompt appears and continue to hold the magnet in place for an additional 3-4 seconds (until the display starts to scroll Status Is ). The display will scroll the complete list of detector status parameters sequentially: Sensor Model Type The menu item appears as: 700 IR Current Software Version The menu item appears as: Version 1.XX Gas Type The menu item appears as: Gas Type = CH4 Range of Detection The menu item appears as: Range XXX Serial ID Address The menu item appears as: Serial ID XX AutoSpan Level The menu item appears as: Auto Span Level XX Days From Last AutoSpan The menu items appears as: Last Cal XX days Remaining Sensor Life The menu item appears as: Sensor Life 100% Gas Factor The menu item appears as: Gas Factor = X.XX Raw Active Counts The menu item appears as: Active Counts XXXX Raw Reference Counts The menu item appears as: Reference Counts XXXX 4-20mA Output The menu item appears as: ma Output X.XX ma Input Voltage Supply The menu item appears as: Voltage XX.X VDC Sensor Operating Temperature The menu item appears as: Temp XX C OLCT 700/710 IR Instruction Manual Rev. B1 Page 19 of 46

26 When the status list sequence is complete, the OLCT 700/710 will revert to the View Sensor Status text scroll. The user can either: 1) review list again by executing another 3-4 second hold, 2) move to another menu item by executing a momentary hold over PGM1 or PGM2, or 3) return to Normal Operation via automatic timeout of about 15 seconds (the display will scroll View Sensor Status 4 times and then return to Normal Operation) Set AutoSpan Level Set AutoSpan Level is used to set the span gas concentration level that is being used to calibrate the detector. This level is adjustable from 5% to 95% of range. The current setting can be viewed in View Program Status. From the Set AutoSpan Level text scroll, hold the magnet over PGM1 or PGM2 until the prompt appears and continue to hold the magnet in place for an additional 3-4 seconds (until the display starts to scroll Set Level ). The display will switch to XX (where XX is the current gas level). Swipe the magnet momentarily over PGM2 to increase or PGM1 to decrease the AutoSpan Level until the correct level is displayed. When the correct level is achieved, hold the magnet over PGM1 or PGM2 for 3-4 seconds to accept the new value. The display will scroll Level Saved, and revert to Set AutoSpan Level text scroll. Move to another menu item by executing a momentary hold, or return to Normal Operation via automatic timeout of about 15 seconds (the display will scroll Set AutoSpan Level 4 times and then return to Normal Operation) Set Gas Type& Range The IR sensor has a slightly different linearization requirement for different groupings of target gases. The four groupings are 1) Methane (CH 4 ) and 2) Heavier Hydrocarbons (H HC) and 3) % by volume (%VOL) and 4) CO 2. The Set Gas Type menu function is a simple choice between these four gas type groupings. NOTE: The default value for Gas Type is methane (CH 4 ). The menu item appears as: Set Gas Type. From the Set Gas Type & Range text scroll, hold the magnet over PGM1 or PGM2 until the prompt appears and continue to hold the magnet in place for an additional 3-4 seconds (until the display starts to scroll CH4 / H HC / %VOL / CO2 ). Swipe the magnet momentarily over PGM2 or PGM1 to change the selection until the correct choice is displayed. Hold the magnet over PGM1 or PGM2 for 3 seconds to accept the new value. The display will scroll Type Saved, then Set Range followed by the currently selected Range. Momentarily hold the magnet over PGM1 or PGM2 to change the Range Selection until the correct value is displayed. Hold the magnet over PGM1 or PGM2 for 3 seconds to accept the new value. NOTE 1: If a gas type of CH4, HHC, or %VOL is selected the range can only be set to 100. If CO2 gas type is selected range selections are 0.3, 0.5, 1, 3, 5, 10, 15, 20, 25, 50, and 100. NOTE 2: For CO 2 there are two different plug-in IR sensors. One sensor is used for the ranges of 0.3, 0.5, 1, 3, and 5% vol.. The second is used for the ranges of 10, 15, 20, 25, 50, and 100% vol.. These sensors cannot be mismatched. Move to another menu item by executing a momentary hold, or, return to Normal Operation via automatic timeout of about 15 seconds (the display will scroll Set Gas Type and Range 4 times and then return to Normal Operation). Page 20 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

27 3.5.5 Set Gas Factor Because of the IR sensor s almost universal response to combustible hydrocarbon gases, the OLCT 700/710 IR detector can be configured and calibrated to detect any of the combustible gases listed in the Table 2. The detected gas is referred to as the target gas and the span calibration gas is referred to as the cal gas. In cases where the cal gas is different from the target gas, the Set Gas Factor menu function is used to maintain accuracy. This feature allows for a significant degree of flexibility in the detection and span calibration process. Set Gas Factor is used to make the appropriate signal sensitivity adjustment when the target gas is different from the cal gas. This is necessary because the IR sensor has different signal strengths for each combustible hydrocarbon gas. The Gas Factor value is adjustable from 0.2 to 5.0. It represents the translation between the target gas and the cal gas when they are different. To calculate the correct Gas Factor, refer to Table 2 and take the Gas Factor of the target gas and divide by the Gas Factor of the cal gas. The calculated value is the correct number to enter into the menu as the Gas Factor. For example, if calibrating with methane when propane is the target gas, the correct Gas Factor to enter would be 0.63/1.0 = For example, if calibrating with isobutane when ethane is the target gas, the correct Gas Factor to enter would be 0.38/0.72=0.53. Table 2 shows the Gas Factors of most combustible hydrocarbon gases that will be measured. Find the gas of interest for the cal gas and the target gas and follow the above instruction. If there is a mixture of target gases, use a weighted approach to determine the correct Gas Factor. For example, if the target gas was 50% isobutane and 50% pentane and the cal gas was propane, the correct Gas Factor would be calculated and entered as ((0.5 x 0.72) + (0.5 x 0.77)) / 0.63 = Table 2: Gas Factors Gas Factor Gas Factor Gas Factor Acetic Acid 2.00 Decane 1.53 Naphthalene Acetone 1.21 Ethyl Alcohol 0.35 n-nonane 1.53 Benzene 1.00 Ethane 0.38 n-octane ,3-Butadiene 1.80 Ethyl Benzene 1.07 n-pentane 0.77 Butane 0.77 Ethylene 2.39 Propane 0.63 Iso-Butane 0.72 n-heptane 0.98 iso-propyl Alcohol 0.54 Butene n-hexane 1.00 Propylene 0.80 n-butyl Alcohol 0.63 Dimethyl Ether 0.40 Toluene 1.00 iso-butyl Alcohol 0.63 Methane 1.00 Vinyl Acetate 1.43 Cyclohexane 0.89 Methanol 0.41 Vinyl Chloride Cyclopropane 0.45 Methyl Ethyl Ketone 0.77 Xylene 1.00 From the Set Gas Factor text scroll, hold the magnet over PGM1 or PGM2 until the prompt appears and continue to hold the magnet in place for an additional 3-4 seconds (until the display starts to scroll Set Factor ). The display will then switch to X.XX (where X.XX is the current gas factor). Swipe the magnet momentarily over PGM2 to increase or PGM1 to decrease the gas factor level until the correct value is displayed. Hold the magnet over PGM1 or PGM2 for 3 seconds to accept the new value. The display will scroll Factor Saved, and revert to Set Gas Factor text scroll. Move to another menu item by executing a momentary hold, or, return to Normal Operation via automatic timeout of about 15 seconds (the display will scroll Set Gas Factor 4 times and then return to Normal Operation). OLCT 700/710 IR Instruction Manual Rev. B1 Page 21 of 46

28 NOTE 1: The default value for Gas Factor is 1.0. This would be used when the target gas is the same as the cal gas. Values other than 1.0 would be used when the target gas is different from the cal gas. NOTE 2: Gas Factors can be used for both selections of gas type = CH4 and gas type = HHC-Heavy Hydrocarbons. NOTE 3: The Set Gas Factor is not applicable for CO2 versions and should be set to Set Serial ID Oldham OLCT 700 IR detectors can be polled serially via RS-485 Modbus RTU. Refer to Section 4.0 for details on using the Modbus output feature. Set Serial ID is used to set the Modbus serial ID address. It is adjustable from 01 to 256 in hexadecimal format (01-FF hex). The current serial ID can be viewed in View Sensor Status using the instruction given in Section View Sensor Status. From the Set Serial ID text scroll, hold the programming magnet over PGM1 or PGM2 until the prompt appears and continue to hold the magnet in place for an additional 3-4 seconds (until the display starts to scroll Set ID ). The display will then switch to XX (where XX is the current ID address). Swipe the magnet momentarily over PGM2 to increase or PGM1 to decrease the hexadecimal number until the desired ID is displayed. Hold the magnet over PGM1 or PGM2 for 3-4 seconds to accept the new value. The display will scroll ID Saved, and revert to Set Serial ID text scroll. Move to another menu item by executing a momentary hold, or, return to Normal Operation via automatic timeout of about 15 seconds (the display will scroll Set Serial ID 5 times and then return to Normal Operation) Set Sensor Gain Each Oldham OLCT 700/710 IR combustible hydrocarbon gas detector requires a one-time gain setting to match the plug-in IR sensor with the ITM electronics. This is set automatically during the Set Sensor Gain sequence. The Set Sensor Gain sequence determines the required gain resistance setting for optimal operation. This technique provides for uniformity in sensor-to-sensor operational performance. NOTE: The Set Sensor Gain function is executed during factory calibration of every OLCT 700/710 IR detector. In the field, this menu item is only needed when a replacement plug-in IR sensor is being installed, or when mating a new ITM with an existing plug-in sensor. It is also required if the Restore Defaults menu item is executed. From the Set Sensor Gain text scroll, hold the magnet over PGM1 or PGM2 until the prompt appears and then hold continuously for an additional 3 seconds. The display will scroll Setting Gain and then show the count-up of the gain settings for the active and reference detectors. The typical final values are A = 9 and R = 37. At conclusion, the OLCT 700/710ITM will display Gain Complete and revert to Set Sensor Gain text scroll. The user can then choose to either: 1) move to another menu item by executing a momentary hold, or 2) return to Normal Operation via 5 second automatic timeout Signal Output Check Signal Output Check provides a simulated 4-20mA output and RS-485 Modbus output. This simulation allows the user to conveniently perform a functional system check of their entire safety system. This signal output simulation also aids the user in performing troubleshooting of signal wiring problems. Page 22 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

29 From the Signal Output Check text scroll, hold the magnet over PGM1 or PGM2 until the prompt appears and then hold continuously for an additional 10 seconds. Once initiated, the display will scroll Simulation Active until the function is stopped. During simulation mode, the 4-20mA value will be increased from 4.0mA to 20.0mA (in 1% of range increments at about a 1 second update rate) and then decreased from 20.0mA to 4.0mA. The same simulation sequence is applied to the Modbus output gas reading. NOTE: Signal Output Check stays active indefinitely until the user stops the function. There is no automatic timeout for this feature. To end simulation mode, hold magnet over PGM1 or PGM2 for 3 seconds. The display will either move to the prior menu item or move to the next menu item respectively. Move to another menu item by executing a momentary hold, or, return to Normal Operation via automatic timeout of about 15 seconds Restore Factory Defaults Restore Factory Defaults is used to clear current user configuration and calibration data from memory and revert to factory default values. This may be required if the settings have been configured improperly and a known reference point needs to be re-established to correct the problem. NOTE: Restoring Factory Defaults should only be used when absolutely necessary. All previously existing configurational inputs will have to be re-entered if this function is executed. A full 10-second magnet hold on PGM 2 is required to execute this function. From the Restore Defaults text scroll, hold the programming magnet over PGM2 until the prompt appears and continue to hold 10 seconds. The display will scroll Restoring Defaults, and then will revert to the Restore Defaults text scroll. Move to another menu item by executing a momentary hold, or, return to Normal Operation via automatic timeout of about 15 seconds (the display will scroll Restore Defaults 4 times and then return to Normal Operation). Following the execution of Restore Defaults, the OLCT 700/710 IR will revert to its factory default settings. The default settings are: Serial ID = 01. The Serial ID must be set appropriately by the operator (Section 3.5.6). NOTE: The following must be performed in order before the detector can be placed in operation. AutoSpan Level = 50 %LEL. AutoSpan level must be set appropriately by the operator (Section 3.5.3). Gas Type = CH4. The Gas Type must be set appropriately by the operator (Section 3.5.4). Gas Factor = 1.0. The Cal Factor must be set appropriately by the operator (Section 3.5.5). Sensor Gain: Sensor gain settings are lost. Sensor Gain must be performed (Section 3.5.7). AutoZero: AutoZero Calibration Settings are lost. AutoZero must be performed (Section 3.4). AutoSpan: AutoSpan Calibration Settings are lost. AutoSpan must be performed (Section 3.4). OLCT 700/710 IR Instruction Manual Rev. B1 Page 23 of 46

30 3.6 Program Features Oldham OLCT 700/710 IR gas detectors incorporate a comprehensive set of diagnostic features to achieve Fail-Safe Operation. These Operational features and Failsafe Diagnostic features are detailed below Operational Features Over-Range When gas greater than the full-scale range is detected, the OLCT 700/710 display will continuously flash the full-scale reading of 100. This designates an over-range condition. The 4-20mA signal will report a 22mA output during this time. In-Calibration Status When the detector is engaged in AutoZero or AutoSpan calibration, the 4-20mA output signal is taken to 2.0mA and the in-calibration Modbus Status Register bit 14 is set. This alerts the user that the OLCT 700/710 is not in an active measurement mode. This feature also allows the user to log the AutoZero and AutoSpan events via their master control system. Sensor Life Sensor Life is calculated after each AutoSpan calibration and is reported as an indicator of remaining service life. It is reported in the View Sensor Status menu and as a RS-485 Modbus register bit. Sensor Life is reported on a scale of 0-100%. When Sensor Life falls below 25%, the sensor cell should be replaced within a reasonable maintenance schedule. Last AutoSpan Date This reports the number of days that have elapsed since the last successful AutoSpan. This is reported in the View Sensor Status menu Fault Diagnostic/Fail-Safe Features Fail-Safe/Fault Supervision OLCT 700/710 IR MicroSafe detectors are designed for Fail-Safe operation. If any of the diagnostic faults listed below are active, the display will scroll the message Fault Detected every 30 seconds during normal operation. At any time while the Fault Detected message is active, swipe the magnet over PGM1 or PGM2 to display the active fault(s). All active faults will then be reported sequentially. Most fault conditions result in failed operation of the detector and in those cases the 4-20mA signal is dropped to the universal fault level of 0mA. These include Zero Fault, AutoSpan Calibration Faults, Sensor Fault, Processor Fault, Memory Fault, Loop Fault, and Input Voltage Fault. The 0mA fault level is not employed for a Temperature Fault and AutoSpan Reminder Fault. For all diagnostic faults, the associated RS-485 Modbus fault register will be flagged to alert the user digitally. NOTE 1: Refer to the Troubleshooting Guide in section 6 for guidance on fault conditions. Zero Fault If the detector drifts below 10% LEL, the Zero Fault will be declared. A Zero Fault will cause a Fault Detected message to scroll once a minute on the display and drop the 4-20mA output to 0mA. The Modbus fault register bit for Zero Fault will be set and will not clear until the fault condition has been cleared. The detector should be considered Out-of-Service until a successful AutoZero calibration is performed. Range Fault AutoSpan If the detector fails the minimum signal change criteria during AutoSpan sequence (Section 3.4.2) the Range Fault will be declared. A Range Fault will cause a Fault Detected message to scroll once a minute on the display and drop the 4-20mA output to 0mA. The Modbus fault register bit for Range Page 24 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

31 Fault will be set and will not clear until the fault condition has been cleared. The detector should be considered Out-of-Service until a successful AutoSpan calibration is performed. Stability Fault AutoSpan If the detector fails the signal stability criteria during AutoSpan sequence (Section 3.4.2) the Stability Fault will be declared. A Stability Fault will cause a Fault Detected message to scroll once a minute on the display and drop the milliamp output to 0mA. The Modbus fault register bit for Stability Fault will be set and will not clear until the fault condition has been cleared. The detector should be considered as Out-of-Service until a successful AutoSpan calibration is performed. Clearing Fault AutoSpan If the detector fails the signal stability criteria during AutoSpan sequence (Section 3.4.2) the Clearing Fault will be declared. A Clearing Fault will cause a Fault Detected message to scroll once a minute on the display and drop the milliamp output to 0mA. The Modbus fault register bit for Clearing Fault will be set and will not clear until the fault condition has been cleared. The detector should be considered as Out-of-Service until a successful AutoSpan calibration is performed. Sensor Fault If the plug-in IR sensor, or the supporting electronics, fails to meet the required minimum or maximum working signal parameters a Sensor Fault will be declared. A Sensor Fault will cause a Fault Detected message to scroll once a minute on the display. The Modbus fault register bit for Sensor Fault will be set and will not clear until the fault condition has been cleared. If a Sensor Fault occurs, the 4-20mA signal will be set at 0mA until the fault condition is resolved. Processor Fault If the detector has any unrecoverable run-time errors, a Processor Fault is declared. A Processor Fault will cause a Fault Detected message to scroll once a minute on the display. The Modbus fault register bit for Processor Fault will be set and will not clear until the fault condition has been cleared. If a Processor Fault occurs, the 4-20mA signal will be set at 0mA until the fault condition is resolved. Memory Fault If the detector has a failure in saving new data to memory, a Memory Fault is declared. A Memory Fault will cause the Fault Detected message to scroll once a minute on the display. The Modbus fault register bit for Memory Fault will be set and will not clear until the fault condition has been cleared. If a Memory Fault occurs, the 4-20mA signal will be set at 0mA until the fault condition is resolved. 4-20mA Loop Fault If the detector detects a condition where the 4-20mA output loop is not functional (high loop resistance or failed circuit function) a 4-20mA Fault is declared. A 4-20mA Fault will cause the Fault Detected message to scroll once a minute on the display. The Modbus fault register bit for Loop Fault will be set and will not clear until the fault condition has been cleared. If a Loop Fault occurs, the 4-20mA signal will be set at 0mA until the fault condition is resolved. NOTE: If the 4-20mA output is not being used, the Green wire from the ITM must be connected to the Black wire at the (-) J1 terminal (see Figure 10: Detector Wire Connections. Input Voltage Fault If the detector is currently receiving an input voltage that is outside of the VDC range, an Input Voltage Fault is declared. An Input Voltage Fault will cause the Fault Detected message to scroll once a minute on the display. The fault register bit for Input Voltage Fault will be set and will not clear until the fault condition has been cleared. If an Input Voltage Fault occurs, the 4-20mA signal will be set at 0mA until the fault condition is resolved. OLCT 700/710 IR Instruction Manual Rev. B1 Page 25 of 46

32 Temperature Fault If the detector is currently reporting an ambient temperature that is outside of the 40C to +75C range a Temperature Fault is declared. A Temperature Fault will cause the Fault Detected message to scroll once a minute on the display. The Modbus fault register bit for Temperature Fault will be set and will not clear until the fault condition has been cleared. If a Temperature Fault occurs, the 4-20mA signal remains operational. AutoSpan Reminder Fault If 180 days has elapsed since the last successful AutoSpan, an AutoSpan Fault will be generated. An AutoSpan Fault will cause the Fault Detected message to scroll once a minute on ITM display. The Modbus fault register bit for AutoSpan Reminder Fault will be set and will not clear until the fault condition has been cleared. If an AutoSpan Reminder Fault occurs, the 4-20mA signal remains operational. Refer to the Troubleshooting Guide, Section 6, for guidance on fault conditions If you cannot fix the fault condition, our Technical Service team at support@oldhamgas.com or call +33 (0) Page 26 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

33 4. RS-485 Modbus Protocol OLCT 700/710 detectors feature Modbus compatible communications protocol and are addressable via the program mode. Communication is two wire, half duplex 485, 9600 baud, 8 data bits, 1 stop bit, no parity, with the detector set up as a slave device. A master controller up to 1200 meters (4000 feet) away can theoretically poll up to 256 different detectors. This number may not be realistic in harsh environments where noise and/or wiring conditions would make it impractical to place so many devices on the same pair of wires. If a multi-point system is being utilized, each detector should be set for a different address. Typical address settings are: 01, 02, 03, 04, 05, 06, 07, 08, 09, 0A, 0B, 0C, 0D, 0E, 0F, 10, 11, etc. Detector RS-485 ID numbers are factory default to 01. These can be changed in the field via the Operator Interface described in Section Set Serial ID. The following section explains the details of the Modbus protocol that the OLCT 700/710 detector supports. Code 03 - Read Holding Registers is the only code supported by the transmitter. Each transmitter contains 6 holding registers which reflect its current status. Table 3: Modbus Registers FC REG Content Description R/W Content Definition Value Meaning Range Device Type R 8 OLCT 700/710 Detector Read Detectable Range 1,2 R/W 100 For Write Detectable Range For Read Concentration 3,2 R 1000 Bound by range. If > range, this value is in fault Read AutoSpan Level 4,2 Write AutoSpan Level FP Read only TP 20, 50, 100, 200 IR 0 to R/W 50 Span gas at 50 FP 5% to 95% of Range (40001) TP 2% to 50% of Range (40001) IR 5% to 95% of Range (40001) Read Sensor Life R 85 For 85% sensor life Read Fault Status Bits 5 R 0x0001 0x0002 0x0004 0x0008 0x0010 0x0020 0x0040 0x0080 0x0100 0x0200 0x0400 0x0800 0x1000 0x2000 0x4000 0x8000 Global Fault Auto Span Fault Temperature Fault 4-20mA Fault Input Voltage Fault Memory Fault Processor Fault Clearing Fault Stability Fault Range Fault Sensor Fault Zero Fault Sensor Fault 2 <reserved> In Calibration Communication Error Read Model # R 1, 2, 3, 4, 5 DM, FP, IR, TP, PID respectively Read Days Since Cal R 29 29days Current Output R mA Range ma x Read Input Voltage R V V x Read Temperature R C 03/ Special #1 R/W Function dependent on value of (See Special Register Table 4) 03/ Special #2 R/W Function dependent on value of (See Special Register Table 4) Special #3 R Function dependent on value of (See Special Register Table 4) 03/ Special #4 R/W Function defendant on value of (See Special Register Table 4) OLCT 700/710 IR Instruction Manual Rev. B1 Page 27 of 46

34 FC REG Content Description R/W Content Definition Value Meaning Range OLCT 700/710 IR Calibration Status Calibration Enable R W 0x0000 0x0001 0x0002 0x0003 0x0004 0x0001 0x0002 0x0008 0x0009 0x000A 0x000B Idle Zero Calibration Started Span Calibration Started Span Set Span Calibration Unsuccessful Set Zero Set Span Signal simulation mode Set OLCT 700/710 FP Bridge Voltage Set OLCT 700/710 TP Heater Power Set OLCT 700/710 IR Gain Read Text 1, first char in L R Two Char of Gas/Units String Read Text 2 R Two Char of Gas/Units String Read Text 3 R Two Char of Gas/Units String Read Text 4 R Two Char of Gas/Units String Read Text 5, last char in H R Two Char of Gas/Units String Text null terminator in L R Two Char of Gas/Units String 6 1 Integer ranges from 1 all the way to 10, Units are determined by units field in the notation string 3 Gas Reading times one (x 1) with units in notation string for Low Range = 0. Gas Reading times one (x 10) with units in notation string for Low Range = 1. Gas Reading times one (x 100) with units in notation string for Low Range = 2. 4 Span Gas must be less than or equal to Detectable Range and is usually about ½ of it. 5 Fault status bits self-reset when fault clears 6 Text in ASCII, in order L byte, H byte, L byte See field descriptions of notation string. Gas/Units String Character # Description Units 0x20 Gas Type 0x00 Units This field is PPM, PPB, or % (where _ is a space, 0x20). 0x20 The units filed is terminated with an ASCII space (0x20) Gas Type This field contains the gas type of the cell. Any ASCII string is permissible 0x00 The notation string is terminated with an ASCII null character Table 4: Modbus Special Registers REG FP (40006 = 2) IR (40006 = 3) TP (40006 = 4) Gas Factor (R/W) Gas Factor (R/W) Heater Power (mw) (R/W) Range = 79 to 565 Range = 20 to Cal Factor (R/W) Active Counts Heater Voltage (mv) Range = 79 to Bridge Current (ma) Reference Counts Sensor Resistance (x100 Ω) Bridge Voltage (mv) Range Divisor Heater Current (Read only) 1,10,100, or 1000 (ma ) 1 Only possible ranges are 20, 50, 100, 200. Modbus register will contain either 20, 50, 100, or 200, range divisor is not necessary. Page 28 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

35 OLDHAM detcon inc. OLCT MODEL IR-700 IR LEL Sensor OLCT 700/710 IR 5. Service and Maintenance 5.1 Calibration Frequency Gas detectors are safety devices. OLDHAM recommends the regular testing of fixed gas detection installations. This type of test consists of applying calibration gas at a sufficient concentration to trigger the pre-set alarms. It is to be understood that this test is in no way a replacement for a detector calibration. The bump tests frequency depends on the application. Upon initial installation and commissioning, close frequency tests should be performed, weekly to monthly. Test results should be recorded and reviewed to determine a suitable calibration interval; however, it must not exceed one year. The general manager should put safety procedures in place on-site. OLDHAM cannot be held responsible for their enforcement. 5.2 Visual Inspection The Detector should be inspected annually. Inspect for signs of corrosion, pitting, and water damage. During visual inspection, the Splash Guard should be inspected to insure that it is not blocked. Examine the porous 316SS flame arrestor within the detector s bottom housing for signs of physical blockage or severe corrosion. Also, inspect inside the Junction Box for signs of water accumulation or Terminal Block corrosion. 5.3 Condensation Prevention Packet A moisture condensation packet should be installed in every explosion proof Junction Box. The moisture condensation prevention packet will prevent the internal volume of the J-Box from condensing and accumulating moisture due to day-night humidity changes. This packet should be replaced annually. Oldham s PN is DET Replacement of IR Plug-in Combustible Gas Sensor Housing Bottom Assembly Plug-in Replacable Combustible Hydrocarbon Sensor Lens and LCD Display Splash Guard O-Rings Housing Bottom Locking Set-Screw Magnetic Programming Switches Intelligent Transmitter Module (ITM) Micro-Processor controlled circuit encapsulated in an explosion proof housing. Figure 14: OLCT 700 Assembly OLCT 700/710 IR Instruction Manual Rev. B1 Page 29 of 46

36 a) Remove power to OLCT 700/710 IR detector by lifting the + 24 VDC wire in J-Box. NOTE: It is necessary to remove power while changing the plug-in sensor in order to maintain area classification. b) Use a M1.5 Allen wrench to release the locking setscrew that locks the ITM and bottom housing together (One turn will suffice Do not remove setscrew completely). c) Remove splashguard. Unthread and remove the Bottom Housing from the ITM. d) Gently pull the plug-in sensor out of the ITM. Orient the new plug in sensor so that it matches with the female connector pins. It may be necessary to look from below to assure alignment is correct. When properly aligned, press the sensor in firmly to make the proper connection. e) Thread the Bottom Housing onto the ITM to a snug fit and tighten the locking setscrew using the M1.5 Allen wrench. Reinstall the splashguard. f) With the new IR plug-in sensor physically installed, two functions are required to be performed: 1) Perform the Set Sensor Gain function to match the new sensor with the ITM (Section 3.5.7). 2) Perform a successful AutoZero and AutoSpan to match the new sensor with the ITM (Section 3.4). Page 30 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

37 6. Troubleshooting Guide Refer to the list of Failsafe Diagnostic features listed in Section for additional reference in troubleshooting activities. Listed below are some typical trouble conditions and their probable cause and resolution path. Zero Fault Probable Cause: Sensor Zero has drifted to <-10% LEL. Redo AutoZero Replace the plug-in IR sensor if problem persists Sensor Fault Probable Causes: Plug-in sensor has failed. Recycle power to see if fault clears Check View Sensor Status for a report of Active and Reference Counts (active and reference counts should be about 3000 with no gas applied) Perform Set Sensor Gain and note count values for Ag and Rg (Ag should be 7-11 and Rg should be 33-43) Replace the plug-in IR sensor If problem persists with new plug-in sensor, replace ITM Range Fault Probable Causes: Cal Gas not applied or not applied at appropriate time, Failed Sensor, Problems w/ cal gas and delivery. Perform AutoSpan following the instructions explicitly Check that cal gas value matches the AutoSpan level If using Splashguard with Integral Cal Port, must use Calibration Wind Guard or air movement can compromise span gas delivery Verify correct Gas Type and Gas Factor is entered Check validity of span gas and flow rate (check MFG date on cal cylinder) Check for obstructions through stainless steel sinter element (including being wet) Replace the plug-in IR sensor, and/or bottom housing Stability Fault Probable Causes: Failed Sensor, empty or close to empty Cal Gas Cylinder or problems with cal gas and delivery. Perform AutoSpan following the instructions explicitly Check that cal gas value matches the AutoSpan level If using Splashguard with Integral Cal Port, must use Calibration Wind Guard or air movement can compromise span gas delivery Verify correct Gas Type and Gas Factor is entered Check validity of span gas and flow rate (check MFG date on cal cylinder) Check for obstructions through stainless steel sinter element (including being wet) Replace the plug-in IR sensor, and/or bottom housing OLCT 700/710 IR Instruction Manual Rev. B1 Page 31 of 46

38 Clearing Fault Probable Causes: Failed Sensor, Cal Gas not removed at appropriate time, problems with cal gas and delivery, or Background combustible gases preventing clearing. Perform AutoSpan following the instructions explicitly Remove calibration adapter and gas connections Confirm no combustible gasses in background Check validity of span gas and flow rate (check MFG date on cal cylinder) Check for obstructions through stainless steel sinter element (including being wet) Replace the plug-in IR sensor, and/or bottom housing Poor Calibration Repeatability Probable Causes: Failed Sensor, use of wrong Cal Gas, problems w/ cal gas and delivery, Sensor Corrosion. Check for adequate Sensor Life Increase calibration frequency to quarterly Verify correct Gas Type and Gas Factor is entered Check validity of span gas and flow rate (check MFG date on cal cylinder) Check for obstructions through stainless steel sinter element (including being wet) Replace the plug-in IR sensor, and/or bottom housing Unstable Output/ Sudden spiking Possible Causes: Unstable power supply, inadequate grounding, or inadequate RFI protection. Verify Power source is stable Verify field wiring is properly shielded and grounded Contact Oldham to optimize shielding and grounding Add Oldham s RFI Protection Circuit accessory Nuisance Alarms Check condulet for accumulated water and abnormal corrosion on terminal blocks Check terminal blocks are tight Add or replace Oldham s Condensation Prevention Packet P/N DET Investigate presence of other combustible hydrocarbon gases that may be causing detector response Processor and/or Memory Faults Recycle power in attempt to clear problem Restore Factory Defaults This will clear the processor s memory and may correct problem Remember to re-enter all customer settings for cal gas level, set gain, Serial ID after Restore Factory Defaults If problem persists, replace the Intelligent Transmitter Module (ITM) Unreadable Display If due to excessive sunlight, install a sunshade to reduce glare Nothing Displayed Transmitter not Responding Verify condulet has no accumulated water or abnormal corrosion Verify required DC power is applied to correct terminals Swap with a known-good ITM to determine if ITM is faulty Page 32 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

39 Faulty 4-20mA Output If detector has a normal reading with no Faults displayed, and the 4-20 ma signal output is 0mA. Check that wiring is properly connected at terminal blocks and through to controller inputs The 4-20mA output loop must be closed to avoid a Loop Fault. If the 4-20mA output is not being used the green wire from the ITM must be connected to the (-) J1 terminal to ensure that it does not create a 4-20mA Fault (see Figure 10: Detector Wire Connections Perform a Signal Output Check sequence via Section and verify 4-20mA output with Current Meter Swap with new ITM to determine if the ITM s 4-20mA output circuit has failed If the 4-20mA current loop is still out of tolerance, contact Oldham at support@oldhamgas.com No Communication RS-485 Modbus If unit has a normal reading with no Faults displayed and the Modbus is not communicating. Verify that the correct (and non-duplicated) serial address is entered (per Section 3.5.6) Check that wiring is properly connected at terminal blocks and through to controller inputs Perform a Signal Output Check sequence via Section and troubleshoot wiring Swap with new ITM to determine if the ITM s serial output circuit is faulty OLCT 700/710 IR Instruction Manual Rev. B1 Page 33 of 46

40 Customer Support and Service Policy Oldham Headquarters OLDHAM S.A.S. Z.I Est rue Orfila CS Arras Cedex France Phone: +33 (0) Fax: +33 (0) website: customer service: technical support: repair activities: All Technical Service and Repair activities should be handled by the Oldham Service Department via phone, fax or at contact information given above. RMA numbers should be obtained from the Oldham Service Department prior to equipment being returned. For on-line technical service, customers should have ready the model number, part number, and serial number of product(s) in question. Page 34 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

41 7. Appendix 7.1 Specifications Sensor Type: Sensor Life: Measurement Range: Combustible CO 2 Accuracy/ Repeatability: Combustible CO 2 Response Time: Combustible CO 2 Zero Drift (Combustible): Analog Output: Serial Output: Status Indicators: Faults Monitored: Continuous diffusion/adsorption type NDIR Non-Dispersive Infrared Sub-miniature plug-in replaceable type 5 years typical 0-100% LEL, 0-50% LEL, 0-100% by volume (Combustible Gas) 0-0.3/0.5/0-1/0-3/0-5% by volume (low range version) 0-10/0-15/0-20/0-25/0-50/0-100% by volume (high range version) ± 2% (0-50% LEL) ± 5% of Range T50 < 10 seconds, T90 < 30 seconds (respectively 6s and 10s as tested with 1 LPM flow rate) T50 < 15 seconds, T90 < 40 seconds 2% per 2 years Linear 4-20mA DC current (1000 ohms maximum loop 24VDC) 0mA All Fault Diagnostics 2mA In-Calibration 4-20mA 0-100% full-scale 22mA Over-range condition RS-485 Modbus RTU 9600 BPS (9600,N,8,1 Half Duplex) 4-digit LED Display with gas concentration full-script menu prompts for AutoSpan, Set-up Options, and Fault Reporting Heater, Loop, Input Voltage, Sensor, Processor, Memory, Calibration ATEX Marking: II 2 G Ex d IIB+H 2 T4 Gb (Tamb=-40 to +75 C) Ingress Protection: Safety Approvals: Warranty: NEMA 4X, IP66 ATEX CE Marking SIL2 FMEDA Rating Plug-in sensor 2 years Transmitter 2 years OLCT 700/710 IR Instruction Manual Rev. B1 Page 35 of 46

42 Environmental Specifications Operating Temperature: Storage Temperature: Operating Humidity: -40 F to +167F ; -40 C to +75 C -40 F to +167F ; -40 C to +75 C 0-100% RH (Non-condensing) Operating Pressure Range: Atmospheric ± 10% Mechanical Specifications Dimensions : OLCT 700 OLCT 710 Weight: Electrical Specifications Input Voltage: Power Consumption: Inrush current: RFI/EMI Protection: 7"H x 2.2" Dia.; 178mmH x 65mm Dia "H x 5.0"W x 5.12"D; 349mmH x 127mmW x 130mmD 2.5 lbs; 1.14 kg (OLCT 700 only) 7.4 lbs; 3.36 kg (OLCT 710 w/aluminum j-box) 16.4 lbs; 7.44 kg (OLCT 710 w/stainless steel j-box) VDC Normal operation = 68mA (<1.7 watt) Maximum = 85mA (2 watts) 24V Complies with EN 50270:06 for Type 2 device Cable Requirements: I/O Protection: Power/Analog: Serial Output: 3-wire shielded cable Maximum distance is 4000 meters feet with 14 AWG 2-wire twisted-pair shielded cable specified for RS-485 use Maximum distance is 1200 meters to last detector Over-Voltage, Miss-wiring, EMI/RFI Immunity Page 36 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

43 7.2 Spare Parts, Detector Accessories, Calibration Equipment Part Number Spare Parts DET OLCT 700/710 IR Intelligent Transmitter Module (ITM) DET OLCT 700/710 IR Housing Bottom Assembly (includes Flame Arrestor) DET CH-700 OLCT 700/710 IR Replacement Plug-in Combustible Gas Sensor DET OLCT 700/710 IR Replacement Plug-in CO 2 Sensor (Ranges 5%) DET OLCT 700/710 IR Replacement Plug-in CO 2 Sensor (Ranges 10%) DET Transient Protection PCA for OLCT 700/710 detectors Detector Accessories DET Sensor Splashguard with integral Cal-Port for OLCT 700/710 DET Harsh Environment Sensor guard for OLCT 700/710 DET Programming Magnet DET Condensation prevention packet (for J-Box replace annually) OLCT 710 ceiling mount Calibration Accessories DET Calibration Wind Guard DET Threaded Calibration Adapter Span Gas cylinder: 50% LEL Methane (2.5% vol.) balance air Contains 112 liters of gas Span Gas cylinder: Zero Air. Contains 112 liters of gas Span Gas cylinder: Pure N2. Contains 112 liters of gas Span Gas Cylinder: 2.5 vol. CO2 balance air Contains 112 liters of gas l/min Fixed Flow Regulator for span gas cylinder Recommend Spare Parts for 2 Years DET OLCT 700/710 IR Intelligent Transmitter Module (ITM) DET OLCT 700/710 IR Housing Bottom Assembly (includes Flame Arrestor) DET CH-700 OLCT 700/710 IR Replacement Plug-in Combustible Gas Sensor DET OLCT 700/710 IR Replacement Plug-in CO 2 Sensor (Ranges 5%) DET OLCT 700/710 IR Replacement Plug-in CO 2 Sensor (Ranges 10%) DET Transient Protection PCA DET Condensation prevention packet (for J-Box replace annually) OLCT 700/710 IR Instruction Manual Rev. B1 Page 37 of 46

44 7.3 OLCT 700/710 IR Drawings Page 38 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

45 OLCT 710 IR Series Dimensional OLCT 700/710 IR Instruction Manual Rev. B1 Page 39 of 46

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47 8. EC Declaration of conformity OLCT 700/710 IR Instruction Manual Rev. B1 Page 41 of 46

48 Page 42 of 46 Rev. B1 OLCT 700/710 IR Instruction Manual

49 9. Revision Log Revision Date (dd/mm/yyyy) Changes made Approval A.0 30/09/2014 Release MS B.0 18/06/2015 Addition of the OLCT 710 MS B.1 29/09/2015 EC Declaration Update MS OLCT 700/710 IR Instruction Manual Rev. B1 Page 43 of 46

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52 The Fixed Gas Detection Experts EUROPEAN PLANT AND OFFICES Z.I. Est rue Orfila CS Arras Cedex FRANCE Tel: +33 (0) Fax: +33 (0) Website: AMERICAS Tel: Fax: ASIA PACIFIC Tel: Fax: EUROPE Tel: Fax: